So do you think that bone loss is possible without feeling any pain?
Of course it's possible if it happens slowly, because it happens to everyone as they age. But, unless you get a dexa scan and have had one in the past to compare it to, there's no way to medically confirm bone loss with 100% certainty; otherwise you can only guess by appearance, which can get very murky. Hell, you can even develop body dysmorphia about this kind of thing if you read about and obsess over it enough. If there's any question as to whether or not you have bone loss, do yourself a favor and assume that you don't. Take cofactors for bone growth/density as a precaution and then focus on holistic healing that will help your entire organism recover over time. I know from personal experience that getting stuck on this sort of thing will do you absolutely no good. If you're looking for someone on the internet to convince you that you do or do not have bone loss, you will only be disappointed.
For example, a couple of months ago I was absolutely sure that I had bone loss in my face. The structure felt different, the way my teeth fit together felt different, my teeth, jaw, cheeks, and chin were hurting, my gums were swollen and rapidly receding, and I felt that my face looked very different whenever I caught my reflection. Today, my face has filled out a bit, my teeth fit together just as they used to, I have no more pain, and when I look in the mirror I can't say for certain that I ever did suffer any bone loss. Things only started to get better once I stopped obsessing over them and started focusing on my overall health. 100% RDA of all vitamins and minerals through food, strategic supplementation based on hair analysis, consistent exercise that doesn't over-stress the body, meditation, yoga, breathing exercises, going to sleep early, waking up early, no gluten, no processed foods, no refined sugars/carbs, a handful of other lifestyle changes, and MOST IMPORTANTLY, not thinking about PFS symptoms 24/7.